Finding the Third Proportional to 1,427,408 and 3,138,712

Step by Step Solution

1. Step 1: Write the proportion equation
   1,427,408 : 3,138,712 = 3,138,712 : x
2. Step 2: Convert to fraction form
   1,427,408/3,138,712 = 3,138,712/x
3. Step 3: Cross multiply
   1,427,408x = 3,138,712 × 3,138,712
4. Step 4: Simplify right side
   1,427,408x = 9,851,513,018,944
5. Step 5: Solve for x
   x = 9,851,513,018,944/1,427,408
6. Step 6: Final answer
   x = 6,901,679.84